refactored error handling for better architecture.

system/file.php

@@ -48,6 +48,29 @@ class File {
 		return pathinfo($path, PATHINFO_EXTENSION);
 	}
 
+	/**
+	 * Get the lines surrounding a given line in a file.
+	 *
+	 * @param  string  $path
+	 * @param  int     $line
+	 * @param  int     $padding
+	 * @return array
+	 */
+	public static function snapshot($path, $line, $padding = 5)
+	{
+		if ( ! file_exists($path)) return array();
+
+		$file = file($path, FILE_IGNORE_NEW_LINES);
+
+		array_unshift($file, '');
+
+		if (($start = $line - $padding) < 0) $start = 0;
+
+		if (($length = ($line - $start) + $padding + 1) < 0) $length = 0;
+
+		return array_slice($file, $start, $length, true);
+	}
+
 	/**
 	 * Get a file MIME type by extension.
 	 *